diff --git a/chapters/initialization.txt b/chapters/initialization.txt
index 4c16cf3a..4ceabe6c 100644
--- a/chapters/initialization.txt
+++ b/chapters/initialization.txt
@@ -56,28 +56,31 @@ be cast to the type of the command being queried.
 [width="80%",options="header"]
 |====
 | pname:instance   | pname:pName                                  | return value
-| *                | `NULL`                                       | undefined:
-| invalid instance | *                                            | undefined:
+| *^1^             | `NULL`                                       | undefined:
+| invalid non-`NULL` instance | *^1^                              | undefined:
 ifdef::VK_VERSION_1_1[]
 | `NULL`           | flink:vkEnumerateInstanceVersion             | fp
 endif::VK_VERSION_1_1[]
 | `NULL`           | flink:vkEnumerateInstanceExtensionProperties | fp
 | `NULL`           | flink:vkEnumerateInstanceLayerProperties     | fp
 | `NULL`           | flink:vkCreateInstance                       | fp
-| `NULL`           | * (any pname:pName not covered above)        | `NULL`
-| instance         | core Vulkan command                          | fp^1^
-| instance         | enabled instance extension commands for pname:instance    | fp^1^
-| instance         | available device extension^2^ commands for pname:instance | fp^1^
-| instance         | * (any pname:pName not covered above)        | `NULL`
+| instance         | core Vulkan command                          | fp^2^
+| instance         | enabled instance extension commands for pname:instance    | fp^2^
+| instance         | available device extension^3^ commands for pname:instance | fp^2^
+2+|  any other case, not covered above                            | `NULL`
 |====
 
 1::
+    "*" means any representable value for the parameter (including valid
+    values, invalid values, and `NULL`).
+
+2::
     The returned function pointer must: only be called with a dispatchable
     object (the first parameter) that is pname:instance or a child of
     pname:instance, e.g. slink:VkInstance, slink:VkPhysicalDevice,
     slink:VkDevice, slink:VkQueue, or slink:VkCommandBuffer.
 
-2::
+3::
     An "`available device extension`" is a device extension supported by any
     physical device enumerated by pname:instance.
 
@@ -109,15 +112,25 @@ first parameter) that is pname:device or a child of pname:device.
 .vkGetDeviceProcAddr behavior
 [width="80%",options="header"]
 |====
-| pname:device   | pname:pName                           | return value
-| `NULL`         | *                                     | undefined:
-| invalid device | *                                     | undefined:
-| device         | `NULL`                                | undefined:
-| device         | core device-level Vulkan command      | fp
-| device         | enabled device extension commands     | fp
-| device         | * (any pname:pName not covered above) | `NULL`
+| pname:device   | pname:pName                      | return value
+| `NULL`         | *<1>                             | undefined:
+| invalid device | *<1>                             | undefined:
+| device         | `NULL`                           | undefined:
+| device         | core device-level Vulkan command | fp^2^
+| device         | enabled device extension device-level commands | fp^2^
+2+| any other case, not covered above               | `NULL`
 |====
 
+1::
+    "*" means any representable value for the parameter (including valid
+    values, invalid values, and `NULL`).
+
+2::
+    The returned function pointer must: only be called with a dispatchable
+    object (the first parameter) that is pname:device or a child of
+    pname:device e.g. slink:VkDevice, slink:VkQueue, or
+    slink:VkCommandBuffer.
+
 include::{generated}/validity/protos/vkGetDeviceProcAddr.txt[]
 
 --